A reversing clutch for agricultural machinery

Abstract

The utility model discloses a kind of reversing clutches for agricultural machinery, specifically related to clutch technical field, including agricultural main shaft, a pair of wet clutch units is arranged on agricultural main shaft, each wet clutch unit includes shell, shell is connected on agricultural main shaft by spline, multiple friction plates and partition plates are also arranged in shell coaxially and staggered, extension groove is set up on shell, partition plate extends into extension groove, inner shell is rotatably connected on agricultural main shaft by deep groove ball bearing, friction plate is drivingly connected with inner shell;Back plate is arranged between shell and inner shell, acting piston is arranged in shell, spring group is arranged in inner shell, spring group is in contact with acting piston, gear one and gear two are respectively fixedly connected on a pair of inner shell;The utility model solves the technical problems that clutch lubrication and heat dissipation efficiency are low and double clutch scheme structure is complex.

Description

Technical Field

[0001] This utility model relates to the field of clutch technology, and more specifically, to a reversing clutch for agricultural machinery. Background Technology

[0002] A clutch is a device installed between the drive shaft and the driven shaft, located in the flywheel housing between the engine and the gearbox, used to separate or engage the rotational motion of the two shafts. The clutch is a common component in mechanical transmissions, allowing the transmission system to be separated or engaged at any time. It functions as a starter, stopper, directional switch, and speed changer in the transmission system, and can also provide overload protection for machinery.

[0003] Existing reversing clutches rely on traditional distributed oil holes for oil supply during use, resulting in poor oil flow and uneven coverage. To achieve the reversing function, a dual-clutch parallel scheme is adopted, but its inherent structural complexity leads to an excessively large axial dimension, which severely restricts the compact layout of the transmission system.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a reversing clutch for agricultural machinery in order to achieve a more practical purpose. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can address the low efficiency of clutch lubrication and heat dissipation, as well as the complex structure of dual-clutch systems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a reversing clutch for agricultural machinery, comprising a main shaft of the agricultural machinery, a pair of wet clutch units disposed on the main shaft of the agricultural machinery, each wet clutch unit comprising a housing, the housing being connected to the main shaft of the agricultural machinery via a spline, the housing further comprising a plurality of coaxial and staggered friction plates and a partition plate, the housing having an extension groove, the partition plate extending into the extension groove, an inner housing being rotatably connected to the main shaft of the agricultural machinery via a deep groove ball bearing, the friction plates being drively connected to the inner housing; A back plate is provided between the outer shell and the inner shell. An actuating piston is provided inside the outer shell, and a spring assembly is provided inside the inner shell. The spring assembly is in contact with the actuating piston. Gear 1 and gear 2 are fixedly connected to a pair of inner shells respectively.

[0007] In a preferred embodiment, the outer ring of the partition plate is provided with a key block, which engages with the extension groove.

[0008] In a preferred embodiment, the inner ring of the friction plate is provided with a second key block, and the outer surface of the inner shell is provided with an external spline for engagement of the second key block.

[0009] In a preferred embodiment, a sealing lip one and a sealing lip two are provided between the actuating piston and the outer casing, the sealing lip one and the sealing lip two being located on the inner and outer sides of the actuating piston, respectively.

[0010] In a preferred embodiment, a sealing ring is provided between the main shaft of the agricultural machinery and the housing.

[0011] In a preferred embodiment, a retaining spring is fixedly connected to the back plate, the retaining spring being snapped onto the inner wall of the outer casing, and the back plate is located on one side of the partition plate.

[0012] In a preferred embodiment, the spring assembly includes a pair of spring seats, a compression spring fixedly connected between the pair of spring seats, a retaining ring two fixedly connected to one of the spring seats, the retaining ring two being engaged with the inner wall of the inner shell, and the other spring seat being in contact with the actuating piston.

[0013] In a preferred embodiment, the main shaft of the agricultural machinery is provided with a cooling oil passage.

[0014] In a preferred embodiment, a pressure oil passage is provided inside the main shaft of the agricultural machinery, the pressure oil passage runs through the main shaft of the agricultural machinery, and a pressure oil chamber is provided between the actuating piston and the outer casing, the pressure oil passage being connected to the pressure oil chamber.

[0015] The technical effects and advantages of this utility model are as follows: This agricultural machinery reversing clutch features an extension groove on its outer casing that engages with a partition plate. This extension groove facilitates the transmission of torque from the outer casing to the partition plate while simultaneously forming a highly efficient, large-section lubricating oil channel. As the clutch rotates, lubricating oil can flow smoothly and in a large volume through the extension groove and through the gaps between multiple friction plates, significantly improving heat dissipation efficiency. This design avoids the complex process of machining a large number of precision oil holes, thus reducing machining costs.

[0016] This agricultural machinery uses a reversing clutch that arranges two wet clutch units in parallel, sharing key components such as the housing, separator plates, and friction plates. The related inner housing and gears are designed as a single piece, significantly reducing the types and number of parts, simplifying supply chain management. This integrated design effectively eliminates the complex connection processes and assembly interfaces required by traditional split structures, significantly reducing assembly complexity and time, while also minimizing potential risks and improving overall reliability. This integrated design fundamentally reduces the axial length and overall volume of the dual-clutch parallel system, solving the layout difficulties of traditional solutions and lowering manufacturing costs. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an overall sectional view of the present invention; Figure 3 This is a cross-sectional view of the main shaft of the agricultural machinery according to this utility model; Figure 4 This is a schematic diagram of the outer shell and partition plate ear structure of this utility model; Figure 5 This is a schematic diagram of the structure of the inner shell and friction plate of this utility model; Figure 6 This is a planar sectional view of the present invention.

[0019] The attached diagram is labeled as follows: 1. Main shaft of agricultural machinery; 2. Deep groove ball bearing; 3. Housing; 4. Acting piston; 5. Friction plate; 6. Partition plate; 7. Back plate; 8. Snap ring one; 9. Gear one; 10. Gear two; 11. Spring assembly; 12. Sealing lip one; 13. Sealing lip two; 14. Snap ring two; 15. Sealing ring; 16. Inner shell; 17. Cooling oil passage; 18. Pressure oil passage; 19. Pressure oil chamber; 20. Extension groove; 21. Key block one; 22. External spline; 23. Key block two. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] See also Figures 1-6 This utility model provides a reversing clutch for agricultural machinery, including a main shaft 1 of the agricultural machinery, a pair of wet clutch units on the main shaft 1, each wet clutch unit including a housing 3, the housing 3 being connected to the main shaft 1 of the agricultural machinery via a spline, and a sealing ring 15 being provided between the main shaft 1 of the agricultural machinery and the housing 3.

[0022] The outer casing 3 is connected to the main shaft 1 of the agricultural machinery via a spline and can be axially assembled separately. The sealing ring 15 can be embedded between the main shaft 1 of the agricultural machinery and the outer casing 3. The sealing ring 15 can improve the sealing performance of the connection between the outer casing 3 and the main shaft 1 of the agricultural machinery.

[0023] In this embodiment, a cooling oil passage 17 is provided inside the main shaft 1 of the agricultural machinery.

[0024] Cooling oil passage 17 is installed through the main shaft 1 of the agricultural machinery. Cooling oil can be pumped into the cooling oil passage 17 by the existing hydraulic system. The cooling oil can promote heat dissipation of the operating main shaft 1 of the agricultural machinery.

[0025] The outer casing 3 is also provided with a plurality of coaxial and staggered friction plates 5 and partition plates 6. An extension groove 20 is provided on the outer casing 3, and the partition plates 6 extend into the extension groove 20. The main shaft of the agricultural machinery is rotatably connected to the inner casing 16 through a deep groove ball bearing 2. The friction plates 5 are connected to the inner casing 16 in a transmission connection. The outer ring of the partition plate 6 is provided with a key block 21, which meshes with the extension groove 20. The inner ring of the friction plates 5 is provided with a key block 23. The outer surface of the inner casing 16 is provided with an external spline 22 for meshing with the key block 23.

[0026] When the main shaft 1 of the agricultural machinery rotates, it can drive the spline-connected outer shell 3 to rotate. The rotation of the outer shell 3 can drive the partition plate 6 with key block 21 to rotate through the extension groove 20. By applying pressure to the partition plate 6, key block 21 on the partition plate 6 can move axially in the extension groove 20. Key block 23 on the friction plate 5 can move axially in the gap between adjacent external splines 22. After the partition plate 6 and the friction plate 5 are clamped, the friction plate 5 can drive the inner shell 16 with external splines 22 to rotate through key block 23. The inner shell 16 can rotate stably on the main shaft 1 of the agricultural machinery through the deep groove ball bearing 2. In this way, the torque can be transmitted to gear 9 or gear 10 on the inner shell 16. In this application, gear 9 or gear 10 are designed as an integral casting / forging with the corresponding inner shell 16.

[0027] The extension groove 20 serves two purposes: firstly, it can constrain the axial movement of the key block 21; secondly, it can form a high-efficiency, large-section lubricating oil channel. When the clutch rotates, the lubricating oil can flow smoothly through the extension groove 20 and through the gaps between multiple friction plates 5, which can significantly improve heat dissipation efficiency.

[0028] In this embodiment: a back plate 7 is provided between the outer shell 3 and the inner shell 16, and a snap ring 8 is fixedly connected to the back plate 7. The snap ring 8 is snapped onto the inner wall of the outer shell 3, and the back plate 7 is located on one side of the partition plate 6.

[0029] The snap ring 8 can prevent the back plate 7 from moving axially on the outer shell 3. The back plate 7 can limit and support the movement of the partition plate 6 and the friction plate 5.

[0030] In this embodiment: an action piston 4 is provided inside the outer casing 3, a pressure oil passage 18 is provided inside the main shaft 1 of the agricultural machinery, the pressure oil passage 18 is provided through the main shaft 1 of the agricultural machinery, a pressure oil chamber 19 is provided between the action piston 4 and the outer casing 3, and the pressure oil passage 18 is connected to the pressure oil chamber 19.

[0031] Taking the engagement of one of the wet clutch units as an example: the engine torque is input through the main shaft 1 of the agricultural machinery, and transmitted to the housing 3 through the spline connection between the main shaft 1 and the housing 3. The housing 3 transmits the torque to the partition plate 6 through the extension groove 20 and the key block 21 on the partition plate 6. The hydraulic system provides pressure oil that can enter through the pressure oil circuit 18. After the pressure oil flows into the pressure oil chamber 19, it can push the piston 4 to move toward the partition plate 6. After the partition plate 6 and the friction plate 5 are pressed together by the piston 4, the torque can be transmitted to the outer spline 22 of the inner housing 16 through the key block 23 on the friction plate 5. Finally, the torque can be transmitted out through the gear 9 or gear 10 on the inner housing 16.

[0032] It is worth noting that the torque transmission path of the other parallel wet clutch unit is the same, except that its engagement is controlled by a different pressure oil circuit 18, ultimately driving different output routes to achieve reversal. Because the two wet clutch units are arranged in parallel and share key structural components such as the housing 3, the partition plate 6, and the friction plate 5, the related inner housing 16 and gears adopt an integrated molding design. This greatly reduces the types and number of parts, simplifies supply chain management, and the integrated design effectively eliminates the complex connection processes and assembly interfaces required by the traditional split structure, significantly reducing assembly complexity and time, while also reducing potential risk points and improving overall reliability.

[0033] In this embodiment, a sealing lip 12 and a sealing lip 2 13 are provided between the piston 4 and the outer shell 3. The sealing lip 12 and the sealing lip 2 13 are located on the inner and outer sides of the piston 4, respectively.

[0034] When the piston 4 moves toward or away from the partition plate 6, the sealing lip 12 and sealing lip 23 can perform a sliding seal on the inner and outer sides of the piston 4.

[0035] In this embodiment: a spring assembly 11 is provided inside the inner shell 16. The spring assembly 11 is in contact with the actuating piston 4. The spring assembly 11 includes a pair of spring seats. A compression spring is fixedly connected between the pair of spring seats. A snap ring 14 is fixedly connected to one of the spring seats. The snap ring 14 is snapped onto the inner wall of the inner shell 16. The other spring seat is in contact with the actuating piston 4.

[0036] The snap ring 14 can prevent the spring seat from moving axially on the inner shell 16. When the actuating piston 4 moves toward the partition plate 6, the actuating piston 4 can push and squeeze the compression spring through a spring seat. After the pressure oil is depressurized, the spring deformation and rebound can push the actuating piston 4 to reset.

Claims

1. A reversing clutch for agricultural machinery, comprising a main shaft (1) of the agricultural machinery, characterized in that: A pair of wet clutch units are provided on the main shaft (1) of the agricultural machinery. Each wet clutch unit includes a housing (3). The housing (3) is connected to the main shaft (1) of the agricultural machinery by a spline. The housing (3) is also provided with a plurality of coaxial and staggered friction plates (5) and a partition plate (6). An extension groove (20) is provided on the housing (3). The partition plate (6) extends into the extension groove (20). An inner shell (16) is rotatably connected to the main shaft (1) of the agricultural machinery by a deep groove ball bearing (2). The friction plates (5) are connected to the inner shell (16) in a transmission connection. A back plate (7) is provided between the outer shell (3) and the inner shell (16). An action piston (4) is provided inside the outer shell (3). A spring assembly (11) is provided inside the inner shell (16). The spring assembly (11) is in contact with the action piston (4). A gear one (9) and a gear two (10) are fixedly connected to a pair of inner shells (16).

2. The reversing clutch for agricultural machinery according to claim 1, characterized in that: The outer ring of the partition plate (6) is provided with a key block (21), which engages with the extension groove (20).

3. The reversing clutch for agricultural machinery according to claim 1, characterized in that: The inner ring of the friction plate (5) is provided with a key block two (23), and the outer surface of the inner shell (16) is provided with an external spline (22) for the engagement of the key block two (23).

4. A reversing clutch for agricultural machinery according to claim 1, characterized in that: A sealing lip one (12) and a sealing lip two (13) are provided between the piston (4) and the outer shell (3), and the sealing lip one (12) and the sealing lip two (13) are located on the inner side and the outer side of the piston (4), respectively.

5. A reversing clutch for agricultural machinery according to claim 1, characterized in that: A sealing ring (15) is provided between the main shaft (1) of the agricultural machinery and the outer casing (3).

6. A reversing clutch for agricultural machinery according to claim 1, characterized in that: A retaining spring (8) is fixedly connected to the back plate (7), and the retaining spring (8) is snapped onto the inner wall of the outer shell (3). The back plate (7) is located on one side of the partition plate (6).

7. A reversing clutch for agricultural machinery according to claim 1, characterized in that: The spring assembly (11) includes a pair of spring seats, with a compression spring fixedly connected between the pair of spring seats. A snap ring (14) is fixedly connected to one of the spring seats, and the snap ring (14) is snapped onto the inner wall of the inner shell (16). The other spring seat is in contact with the actuating piston (4).

8. A reversing clutch for agricultural machinery according to claim 1, characterized in that: The main shaft (1) of the agricultural machinery is equipped with a cooling oil passage (17).

9. A reversing clutch for agricultural machinery according to claim 1, characterized in that: The main shaft (1) of the agricultural machinery is provided with a pressure oil passage (18), which is provided through the main shaft (1). A pressure oil chamber (19) is provided between the piston (4) and the outer casing (3), and the pressure oil passage (18) is connected to the pressure oil chamber (19).

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